Arrangement of boilers in seagoing vessels



Aug. 4, 1936. K, MELDAHL 2,050,237

ARRAI IGEMENT OF BOILERS IN SEAGOING VESSELS Filed July 9, 1931 Patented Aug. 4, 1936 UNITED STATES ARRANGEMENT F BOILERS IN SEAGOING VESSELS Knud Georg Meldahl, Fredriksstad, Norway Application July 9, 1931, Serial No. 549,763 In Norway March 24, 1931 1 Claim.

The location of the main boilers of a steam ship immediately on the floors or the double bottom of the ship, as has hitherto been usual, has very considerable drawbacks. It is objectionable from a hygienic point of view, as an effective ventilation of the deep stokehold is difficult and it is practically always necessary to use artificial lighting. The boiler casing running through all decks occupies much space in the upper decks,

and for removal of the boilers it is as a rule necessary to rip up the upper decks etc., extensively, which is expensive. Special provision is necessary for removing slag and ashes from these deep stokeholds, such as hoists, ejectors or the like. A further disadvantage is that the upper plates of the tank below the boilers, at the high temperature prevailing at this place, corrode quickly under the action of water and moisture in the double bottom forming the tank, and as 20 the upper side of the plates of the tank at this place is also particularly exposed to corrosion owing to the fact that coal dust, etc., which is often sulphurous, deposits at this place, the life of the plates is always comparatively short, even 5 if asphalt covering or the like is used. Also, boilers located at the bottom of the vessel will, if the vessel springs a leak, comparatively quickly be immersed, so that the steam is lost and pumps, lighting installation, wireless telegraph, etc. are 30 put out of action.

The boilers may be mounted on one of the decks, the beams of which in this case are suitably strengthened or on beams arranged between the end bulkheads 0f the boiler room, preferably 35 at the level of one of the decks, or directly on the bulkheads.

It is preferable, where possible, to arrange the boilers abaft the engine room, as thereby the further advantage is obtained that the cargo hold gained forward of the engine room is relatively more efiicient, as it is not hampered by propeller shaft tunnels. The space by the side of the tunnel aft of the engine room may be used, for ex- 45 ample, for auxiliary machinery.

The accompanying drawing illustrates an example of an embodiment of the invention as applied to a shelter deck ship.

Fig. l is a longitudinal section through the ship showing the boiler and engine rooms;

Fig. 2 shows the lower bridge and Fig. 3 the shelter deck.

I is the main deck, 2 the shelter deck and 3 the 55 lower bridge, 4, 4 are the boilers, 5 the boiler room with casing 6, and I the engine room with casing 8; 9 are living rooms, etc.

The boilers are mounted on strong beams l0 between the boiler room bulkhead l2 and the bulkhead II at the level of the main deck, so that 5 the boiler room can be provided with large side lights l3, I3 and doors M in the deck house on the shelter deck, air and light being admitted laterally to the stoke hold in contrast to the usual arrangement in which the room is very low down 0 and the ventilation is consequently diflicult, and where it is nearly always necessary to use artificial lighting. As modern ships are practically always equipped with forced draught for the boilers, the decreased height of the funnel is of no consequence.

As shown in the drawing, a considerable space is gained below the boilers. The space gained is larger if the boiler room, as shown, is arranged partly above the engine room, which may be done without unfavourably decreasing the engine hatch.

In the example shown in the drawing, the forward bulkhead l2 in the boiler room is carried down to the bottom of the vessel and the space I5 between this room and the engine room bulkhead is used as bunkers, a trunk bunker hatch l6 being provided. The bulkhead l2 also may stop at or a little distance below the main deck and the space below the boiler used as a cargo hold. 7

As the floor in the boiler room is situated above the normal water line, shoots for removing slag and ashes may be arranged in this hold, opening out in the ship's side, as indicated at ll.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

In a steam propelled sea-going vessel having 40 its engines and boilers located between cargo holds both forward of and abaft of the same and having a platform elevated to a considerable extent above the vessels bottom, the combination with walls defining an engine room located below said platform, of walls defining a boiler room having boilers therein constituting the sole means for the generation of steam for propelling the vessel, said boiler room being located on said platform and abaft and directly adjacent the engine room, and a boiler stack extending directly upwardly from the boiler room, and means abaft said engine room to accommodate driving propelling means.

KNUD GEORG MELDAHL. 

